MSP430F149 TimerA outputs pwm signal C program code-EEWORLD

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MSP430F149 TimerA outputs pwm signal　

Note the corresponding relationship between the register settings and the PWM signal output pins: P1.2-TA1, TACCR1, TACCTL1; P1.3-TA2, TACCR2, TACCTL2.

#include

#define uint unsigned int

#define uchar unsigned char

void int_clk()

{

uchar i;

BCSCTL1 &= ~XT2OFF; //Turn on XT oscillator

BCSCTL2 |= SELM1+SELS; //MCLK is 8MHz, SMCLK is 8MHz

{

IFG1&=~OFIFG; //Clear oscillation error flag

for(i=0;i<100;i++)

_NOP(); //Delay waiting

}

while((IFG1&OFIFG)!=0); //If the flag is 1, continue to loop and wait

IFG1&=~OFIFG;

}

void int_pwm()

{

P1SEL |= BIT2 + BIT3 ; //Select p1.2-TA1, P1.3-TA2 as the second function of PWM output

P1DIR |= BIT2 + BIT3 ;

TACCR0 = 800; //PWM signal frequency 10KHZ

TACCR1 = 400; // Duty cycle 1:1

TACCTL1 = OUTMOD_7;

TACCR2 = 400 ;

TACCTL2 = OUTMOD_7;

TACTL |= TASSEL1 +ID1 + ID0 + MC0 ; //Select SMCLK increase mode

}

void main()

{

WDTCTL = WDTPW + WDTHOLD;

int_clk();

int_pwm();

while(1);

}

Keywords：MSP430F149 TimerA Reference address：MSP430F149 TimerA outputs pwm signal C program code

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